16-Attachment E - Line Item Descriptions - Revised Per Addendum 2.pdf

PDF 884 KB Posted Sep 5, 2025

Attached to: Stormwater Management, Maintenance and Reporting Services
Solicitation number: RFP 2000004161
Issued by: Fairfax County, Virginia

About this file

Written by GovTribe AI · Sep 23, 2025

This document is a Request for Proposal (RFP) #2000004161 from Fairfax County, Virginia, detailing a comprehensive line-item contract for stormwater facility maintenance, environmental services, and related infrastructure work. The RFP covers an extensive range of services including preventative maintenance, demolition, erosion and sediment control, tree protection, earthwork, pavement maintenance, stream channel maintenance, revegetation, testing, traffic control, equipment rental, labor, and plant-related services. The document provides detailed descriptions for each line item, specifying unit measurements, technical specifications, installation requirements, and performance standards across multiple categories of work.

The pricing structure is unit-based, with costs specified per linear foot, square yard, cubic yard, ton, acre, day, hour, or each (EA) as appropriate to the specific task. While no specific total contract value is stated, the comprehensive nature of the line items suggests a potentially substantial multi-year contract with the potential for renewal. The contract appears designed to provide Fairfax County with flexible, on-demand maintenance and infrastructure services across a wide range of environmental and construction-related needs. Notably, the RFP emphasizes environmental compliance, with many line items requiring adherence to specific state and federal regulations, use of certified professionals, and environmentally sensitive approaches to maintenance and restoration work.

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Other files

File	Type	Posted
5-Attachment C -Task Area Description.pdf	PDF	Sep 5, 2025
9-Attachment F- Tasks 1 and 2.pdf	PDF	Sep 5, 2025
11-Attachment F- Task 3.pdf	PDF	Sep 5, 2025
3-Attachment B.pdf	PDF	Sep 5, 2025
10-Attachment F-Task 2.pdf	PDF	Sep 5, 2025
13-Appendix A.pdf	PDF	Sep 5, 2025
2-Attachment A1-A8 and W9.pdf	PDF	Sep 5, 2025
4-DPMM Coversheet.pdf	PDF	Sep 5, 2025
7-Attachment E - Line Item Descriptions .pdf	PDF	Sep 5, 2025
1-RFP 2000004161.pdf	PDF	Sep 5, 2025
12-Attachment F-All Tasks.pdf	PDF	Sep 5, 2025
14-Addendum 1.pdf	PDF	Sep 5, 2025
15-Addendum 2.pdf	PDF	Sep 5, 2025
6-Attachment D - Facility Inventory 2025.xlsx	XLSX spreadsheet	Sep 5, 2025
8-Attachment F- Task 1.pdf	PDF	Sep 5, 2025

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RFP #2000004161

Attachment E

Line-Item Descriptions

RFP 2000004161

Contents

PREVENTATIVE MAINTENANCE

2000 – DEMOLITION

2100 – EROSION AND SEDIMENT CONTROL

2200 – TREE PROTECTION

2300 – EARTHWORK

2400 – PAVEMENT

2500 – STORMWATER FACILITY MAINTENANCE

2600 – NATURAL STREAM CHANNEL MAINTENANCE

2700 – REVEGETATION

2800 – TESTING

2900 – TRAFFIC CONTROL

3000 – EQUIPMENT

3100 – LABOR

3200 – PLANTS

PREVENTATIVE MAINTENANCE

PM-1

Mowing, Trimming, and Clearing (TA#1)

ACRE

Mowing, trimming, and clearing involve the removal of grasses, weeds, brush, and tree saplings up to 2 inches in diameter, including clusters originating from the same base. Grass must be trimmed to a height between 5.5 and 6 inches, while woody vegetation should be cut near ground level. Mowing must follow a horizontal pattern to maintain an even cut, avoiding up-and-down slope mowing. Trimming must be performed in areas inaccessible to standard mowing equipment, such as embankment perimeters, toe areas, steep slopes, emergency spillways, shorelines, riprap areas, access gates, fence lines, and around signs. Equipment must be suitable for rough terrain and capable of operating on steep slopes without causing soil disturbance. All costs for mobilization, equipment, labor, materials, and disposal are included.

All Ponds: Maintain a 3-foot-wide strip along access roads and entryways, removing limbs, small trees, and brush as needed. Clear the entire dam embankment (front, top, back) plus 10 feet from the front and back toes (ensuring no obstructions impede mowing). Maintain a 10-foot clearance around the control structure, removing grassy and woody vegetation from the structure and trash racks without entering the control structure. Clear vegetation within the emergency spillway and remove trash racks when possible to clear woody debris, sediment, and trash while ensuring any orifices remain unobstructed. Maintain a 10-foot clearance around the outfall structure and outfall channel, removing all cut vegetation and disposing of it off-site.

When directed: Maintain the ponding area, clearing the entire pond floor and interior slopes up to the 100-year flood elevation, excluding wet ponds and enhanced extended detention ponds.

Work around trees larger than 2 inches in diameter where feasible, invoicing based on completed areas.

Remove and properly dispose of all material off-site. Includes all mobilization, equipment, labor, material and disposal costs.

PM-2

Mowing, Trimming, and Clearing (TA#2)

0.1

ACRE

Green Infrastructure (Bioretention and Vegetated Swales): Mow, trim, or clear within and around the facility, extending up to three feet or to the curb, excluding designated landscaped areas or those clearly planted with perennials. Maintain a finished mow height of 2 to 4 inches.

Remove woody growth from vegetated swales annually unless specified in landscape plans.

Use light-duty equipment in bioretention areas to protect filter media. All debris and clippings must be removed and disposed of off-site.

Ponds (Extended Detention Level 2 and Wet Ponds): Mow, trim, and clear grasses, weeds, brush, and tree saplings up to 2 inches in diameter, including clusters from a shared base.

Grass should be maintained at 5.5 to 6 inches, and woody vegetation cut to ground level.

Mowing must follow a horizontal pattern; slopes should not be mowed up and down. Trim inaccessible areas such as embankments, slopes, spillways, shorelines, riprap, gates, fences, and signs. Equipment must suit rough terrain and steep slopes without disturbing soil. Each visit must include maintaining a 3-foot-wide strip along access roads and entryways, clearing limbs and brush, and mowing the dam embankment and the 10 feet beyond both toes. Maintain 10-foot clearances around control structures and outfalls, removing all vegetation, trash, and sediment without entering structures or blocking orifices. All materials must be removed and disposed of off-site.

Wetland Vegetation Management (September): For half of the pond inventory each year, maintain ponding areas per site-specific Maintenance Cards or Landscaping Plans. Remove grasses, weeds, brush, and tree saplings up to 2 inches in diameter, working around larger trees when feasible. Maintain grass height at 5.5 to 6 inches and cut woody vegetation to ground level. Focus on promoting desirable vegetation and removing undesired species without herbicides or large-scale clearing. This work supports future invasive species management under Task Area 5.

All Facility Types: All debris, clippings, and vegetation must be removed and properly disposed of off-site. All associated costs, including mobilization, equipment, labor, materials, and disposal, are included.

PM-3

Mowing, Trimming, and Minor Turf Repair

(TA#6)

ACRE

Mowing and trimming to maintain healthy grass turf cover on steep slopes to prevent erosion.

Mowing extents will be provided by the County for each facility and will generally include mow of the following: the road or entryway; the entire dam plus 25 feet from the toe, top, back, and abutment contacts, taking care that slopes can exceed 3H:1V on some dam sites; 25 feet around the control structure; the emergency spillway;

25 feet around the outfall structure; ten (10) feet on each side of the outfall channel. Grass must be trimmed to a finished height between 5.5 and 6 inches and must not be cut below 5 inches. Mowing must follow a horizontal pattern to maintain an even cut. Mowing up and down the slopes is prohibited. Mowing equipment used (Kut Kwik, Ventrac or equal) must be capable of traversing steep slopes horizontally without slipping or causing soil disturbance (i.e., rutting or scalping).

String trimming must be performed in areas inaccessible to standard mowing equipment, including perimeters of sites, shorelines, riprap areas, and other restricted or hazardous locations. Remove all woody stock, brush and trees up to two (2) inches diameter.

Minor turf repair, including seeding and stabilizing minor bare spots, shall be completed, as needed, to maintain consistent vegetative cover.

Remove and properly dispose of all material off-site. All costs for mobilization, equipment, labor, materials, and disposal are included.

PM-4

Control Structure Cleaning

Remove trash, debris (e.g., “driftwood” and dead organic matter), floatable and other material from around the control structure, inside (within reach) and outside of low flow trash rack (including apron) and on the riser trash rack(s). Confined Space Entry Permit is not required as part of routine maintenance. Remove and properly dispose of all material off-site.

PM-5

Pond Low-Flow Channel Clearing

25 LF

Clear sediment, trash, debris, floatable and other material from the pond channel(s). Clearing during routine maintenance shall include a minimum of the first twenty-five (25’) feet of all channels from the control structure. Remove and properly dispose of all material off-site.

Assume up to five (5) CY per 25 LF.

PM-6 Shoreline Clean-up LF

Remove all trash and debris within 15 feet from the water surface elevation on the wet side and 15 feet from the dry side (dam face or adjacent land), for a total cleanup area of 30 feet.

Cleanup may require the use of a boat to access debris in the water. All collected materials must be removed and properly disposed of off-site.

PM-7

Trash/Debris Removal & Disposal

Remove trash/debris from various components within stormwater facilities including in all ponding areas, flow paths from inflow to the control structure, and pre-treatment cells. Includes check dams and rip-rap areas. Remove and properly dispose of all material off-site. Includes all mobilization, equipment, labor, material and disposal costs.

PM-8

Dewatering/Blockage Removal - With Pump

When first two attempts at dewatering are unsuccessful or unblocking and dewatering with hand tools is not possible, advance to dewatering with a pump within 24 to 48 hours. Drain and remove blockage using a four (4") inch pump. The line items accounts for mobilization and installation of the pump only. Additional hourly rental for equipment rental time applies for pump use time only. This may require the use of a boat.

PM-9

Repair/Replace Facility Sign

Re-use or replace existing sign(s) and attach to existing post. Cost assumes two signs may be installed on single post. Signs and hardware will be provided by the County. Includes all mobilization, equipment, labor, material and disposal costs.

PM-10

Repair/Replace Facility Sign and Post Installation

Re-install or install a new post. Re-use or replace existing sign and attach to existing or new post. Signs, post and hardware will be provided by the County. Includes all mobilization, equipment, labor, material and disposal costs.

PM-11 Install Lock EA Replace or install new County-provided lock.

PM-12

Reporting (Facilities with No Maintenance Required)

Service charge applied when a maintenance visit confirms no maintenance is needed, but documentation and data entry are required for compliance and record-keeping.

PM-13

Bioretention - Level of Service 1 (Standard)

The standard level of service for bioretention includes four maintenance visits per year during the growing season, consisting of mowing and clearing, trash and debris removal, selective weeding of invasive plants, sediment removal by hand, minor erosion and turf repairs, stone amendment where bare earth or filter fabric is exposed, and replacement of damaged or missing clean-out caps. Additionally, perennial cutback, dethatching, and pruning shall be performed once per year to support long-term functionality and vegetation health.

PM-14

Bioretention - Level of Service 2 (Enhanced)

The enhanced level of service for bioretention includes four maintenance visits per year during the growing season, covering all tasks outlined in Level of Service 1 (Standard), including mowing and clearing, trash and debris removal, selective weeding of invasive plants, sediment removal by hand, minor erosion and turf repairs, stone amendment, and clean-out cap replacement. In addition, weeding of all plant species and mulching shall be performed once per year to further support vegetation health and system performance.

PM-15

Vegetated Swale - Level of Service 1 (Standard)

The standard level of service for vegetated swales and infiltration trenches includes four maintenance visits per year during the growing season, consisting of mowing and clearing, trash and debris removal, selective weeding, sediment removal by hand, minor erosion and turf repairs, stone amendment where bare earth or filter fabric is exposed, and replacement of damaged or missing clean-out caps. Additionally, pruning shall be performed once per year to maintain vegetation health and system functionality.

PM-16

Vegetated Swale - Level of Service 2 (Enhanced)

The enhanced level of service for vegetated swales includes four maintenance visits per year during the growing season, covering all tasks outlined in Level of Service 1 (Standard), including mowing and clearing, trash and debris removal, selective weeding, sediment removal by hand, minor erosion and turf repairs, stone amendment, and clean-out cap replacement. Additionally, perennial cutback, dethatching, mulching, and pruning shall be performed once per year to promote vegetation health and maintain system performance.

PM-17 Treebox Filters SF

The level of service for treebox filters includes four maintenance visits per year during the growing season, consisting of trash and debris removal, sediment removal by hand, weeding, dethatching, and replenishment of energy dissipation rocks. Additionally, pruning shall be performed once per year to maintain plant health and ensure proper system function.

PM-18

Floating Treatment Wetlands

The level of service for floating treatment wetlands includes one maintenance visit per year during the growing season, consisting of trash and debris removal, selective weeding, perennial cutback, and pruning. Maintenance activities require the use of a boat to access the wetland.

PM-19

Green Roof - Inspection

EA Inspect Green Roof using established protocols.

PM-20

Green Roof - Extensive, Succulents

The level of service for extensive vegetated green roofs includes eight maintenance visits per year, consisting of trash and debris removal, sediment removal by hand, weeding, and watering.

Additionally, perennial cutback and soil testing for nutrient levels shall be performed once per year to support plant health and system performance.

PM-21 Green Roof - Intensive SF

The level of service for intensive vegetated green roofs includes four maintenance visits per year, covering all tasks outlined in the Extensive Vegetated Green Roof specification, including trash and debris removal, sediment removal by hand, weeding, and watering. Additionally, pruning, perennial cutback, and soil testing for nutrients shall be performed once per year to maintain plant health and ensure optimal system performance.

PM-22

Invasive Species Plant Management

0.1

ACRE

Cataloging of invasive plant species—including their type, health, distribution, and density— must be performed by professionals trained in invasive plant identification. The resulting catalog will serve as a reference for tracking changes in species distribution over time. The required deliverable is an Invasive Species Plant Management Plan, which must include the cataloging results and a facility-specific treatment plan (physical or chemical) to be implemented within the same 8-month growing season. Invasive plant species removal should typically be performed in July and August, after plant species cataloging is complete and prior to the seed set of invasive species.

2000 – DEMOLITION

2000-1 Remove and Dispose of Concrete

Existing concrete designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demotion will not be permitted at the site.

2000-2 Remove and Dispose of Curb & Gutter

Existing curb and gutter designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demolition will not be permitted at the site.

2000-3 Remove and Dispose of Rip-Rap (All Classes)

Existing rip rap designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demolition will not be permitted at the site.

2000-4

Remove and Dispose of Asphalt Pavement/Trail - Thickness ≤ 4"

Existing asphalt designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demolition will not be permitted at the site.

2000-5

Remove and Dispose of Asphalt Pavement/Trail - 4" < Thickness ≤ 12"

2000-6 Saw Cut Asphalt, Up to 4" Depth

LF Existing asphalt designated for construction work shall be saw cut as shown on the drawings

2000-7 Saw Cut Asphalt, 4" to 8" Depth

LF Existing asphalt designated for construction work shall be saw cut as shown on the drawings

2000-8 Saw Cut Concrete LF Existing concrete designated for construction work shall be saw cut as shown on the drawings

2000-9 Building Demolition - Small Masonry

Existing buildings designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demolition will not be permitted at the site.

2000-10 Building Demolition - Small Wood

2000-11 Haul Rubbish CY Remove waste material, including unsuitable soil, trash, and debris, and legally dispose of it off Owner's property.

2000-12 Non-Reinforced Concrete Pavement and Sidewalk Disposal

Existing concrete designated for construction work shall be demolished as shown on the drawings and all debris removed form the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demolition will not be permitted at the site.

2000-13

Welded Wire Fabric Reinforced Concrete Pavement and Sidewalk Disposal

2000-14

Remove Existing Metal Drainage/Riser Structures Up to 8' Diameter, Up to 8' Depth

Existing drainage structures designated for construction work shall be demolished as shown on the drawings and all debris removed form the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demolition will not be permitted at the site.

2000-15

Remove Existing Storm Structure, 4' Diameter, Up to 8' Depth

2000-16

Remove Existing Storm Structure, 4' Diameter, 8' to 20' Depth

2000-17

Remove Existing Storm Structure, 5' Diameter, Up to 8' Depth

2000-18

Remove Existing Storm Structure, 5' Diameter, 8' to 20' Depth

2000-19

Remove Existing Storm Structure, 6' Diameter, Up to 8' Depth

2000-20

Remove Existing Storm Structure, 6' Diameter, 8' to 20' Depth

2000-21

Remove Existing Storm Structure, 7' Diameter, Up to 8' Depth

2000-22

Remove Existing Storm Structure, 7' Diameter, 8' to 20' Depth

2000-23

Remove Existing Storm Structure, 8' Diameter, Up to 8' Depth

2000-24

Remove Existing Storm Structure, 8' Diameter, 8' to 20' Depth

2000-25 Remove Existing Storm Structure, 4'X4', Up to 8' Depth

2000-26 Remove Existing Storm Structure, 4'X4', Up to 8' to 20' Depth

2000-27 Remove Existing Storm Structure, 5'X5', Up to 8' Depth

2000-28 Remove Existing Storm Structure, 5'X5', Up to 8' to 20' Depth

2000-29 Remove and Dispose Riser Top Trash Rack

2000-30 Remove and Dispose Low-Flow BMP Plate/Debris Cage

2000-31 Pipe Removal and Disposal - 4" ≤ Ø ≤ 12", Up to 10' Depth

2000-32 Pipe Removal and Disposal - 4" ≤ Ø ≤ 12", 10' to 20' Depth

2000-33 Pipe Removal and Disposal - 15" ≤ Ø ≤ 30", Up to 10' Depth

2000-34 Pipe Removal and Disposal - 15" ≤ Ø ≤ 30", 10' to 20' Depth

2000-35 Pipe Removal and Disposal - 36" ≤ Ø ≤ 54", Up to 10' Depth

2000-36 Pipe Removal and Disposal - 36" ≤ Ø ≤ 54", 10' to 20' Depth

2000-37

Remove and Dispose of Existing Endwalls or End-sections, 12" - 18" Pipe

2000-38

Remove and Dispose of Existing Endwalls or End-sections, 21" - 27" Pipe

2000-39

Remove and Dispose of Existing Endwalls or End-sections, 30" - 36" Pipe

2000-40

Remove and Dispose of Existing Endwalls or End-sections, 42" - 48" Pipe

2000-41 Remove and Reset Brick Sidewalk

Existing sidewalk designated for construction work shall be removed and reset as shown on the drawings

2000-42 Remove Fence LF

Existing fences designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demotion will not be permitted at the site.

2000-43 Remove Guardrails LF Existing gaurdrails designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demotion will not be

2000-44 Remove and Replace

CG-6/7

Existing curb designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demotion will not be permitted at the site.

2000-45 Remove and Replace CG-9, All Types

2000-46 Remove and Replace

CG-11

2000-47 Remove and Replace

CG-12

Existing sidewalk ramps designated for construction work shall be demolished as shown on the drawings and all debris removed from the site and legally disposed of. Excavation caused by demolition shall be backfilled. Burning of any debris resulting from demotion will not be permitted at the site.

2000-48 Tree Removal - 6" < Ø ≤ 12"

Remove live or dead tree six (6") inches to twelve (12") inches DBH. The tree must be cut flush to the ground. The soil disturbance around the root ball must be minimized. Remove and properly dispose of all material off-site. Includes all mobilization, equipment, labor, material and disposal costs.

2000-49 Tree Removal - 12" < Ø ≤ 24"

Remove live or dead tree thirteen (13") inches to twenty four (24") inches DBH. The tree must be cut flush to the ground. The soil disturbance around the root ball must be minimized.

Remove and properly dispose of all material off-site. Includes all mobilization, equipment, labor, material and disposal costs.

2000-50 Tree Removal - Ø > 24"

Remove live or dead tree greater than twenty four (25") inches DBH. Remove and properly dispose of all material off-site. The tree must be cut flush to the ground. The soil disturbance around the root ball must be minimized. Remove and properly dispose of all material off-site.

Includes all mobilization, equipment, labor, material and disposal costs.

2000-51 Clearing and Grubbing Including Trees up to 6" Ø

0.1

ACRE

Clearing and Grubbing shall include but not be limited to removing low growth vegetation, including shrubs and small trees up to five (5”) inches in diameter, and other waste materials or refuse on site that is not covered under other bid items, and grubbing of top soil. Grub to a depth of 12 inches below the ground surface. Remove and properly dispose of all material off-site.

2000-52 Stump Grinding EA

Remove and grind stumps. The stump must be removed and ground to a minimum depth of three (3') feet below the ground surface. The cavity must be backfilled to be level with the adjacent ground with well compacted embankment material. The disturbed area must then be seeded and mulched. In the area of dam embankment all imbedded stumps and roots must be completely removed. Depressions and holes resulting from removal of stumps must be backfilled with materials suitable for dam embankment construction. The embankment material must be overlaid with six (6") of topsoil, seeded and mulched. The final grade must match the adjacent grades. Remove and properly dispose of all material off-site. Includes all mobilization, equipment, labor, material and disposal costs.

2000-53

Stump Removal and Root Chasing from Dam, greater than 1" diameter

Remove and grind roots greater than 1" diameter. The stump must be removed and ground to a minimum depth of three (3') feet below the ground surface. The cavity must be backfilled to be level with the adjacent ground with well compacted embankment material. The disturbed area must then be seeded and mulched. In the area of dam embankment all imbedded stumps and roots must be completely removed. Depressions and holes resulting from removal of stumps must be backfilled with materials suitable for dam embankment construction. The embankment material must be overlaid with six (6") of topsoil, seeded and mulched. The final grade must match the adjacent grades. Remove and properly dispose of all material off-site.

2000-54 Bushhogging ACRE Clearing of heavy vegetation. Remove and properly dispose of all material off-site.

2000-55 String / Line Trimming 0.1

ACRE

String/Line trimming of perimeters of sites, shoreline, riprap areas, and other areas not accessible by mowing equipment.

2000-56 Tree Removal - 2" < Ø ≤ 6"

Remove live or dead tree six (2") inches to twelve (6") inches DBH. The tree must be cut flush to the ground. The soil disturbance around the root ball must be minimized. Remove and properly dispose of all material off-site. Includes all mobilization, equipment, labor, material and disposal costs.

2100 – EROSION AND SEDIMENT CONTROL

2100-1 Trenched Silt Fence LF Furnish, install, maintain, and remove trenched silt fence with wooden stakes per VSMH spec

C-PCM-04

2100-2 Trenchless Silt Fence LF Furnish, install, maintain, and remove trenchless silt fence with wooden stakes per VSMH spec

C-ENV-10

2100-3 Trenched Super Silt Fence

Furnish, install, maintain, and remove trenched silt fence with wooden stakes per VSMH spec

C-PCM-04

2100-4 Trenchless Super Silt Fence

Furnish, install, maintain, and remove trenchless silt fence with wooden stakes per VSMH spec

C-ENV-10

2100-5 Check Dam EA Furnish, install, maintain, and remove check dam as per VSMH spec C-SCM-07

2100-6 Inlet Protection EA Furnish, install, maintain, and remove inlet protection as per VSMH spec C-SCM-04

2100-7 Culvert Inlet Protection EA Furnish, install, maintain, and remove culvert inlet protection as per VSMH spec C-SCM-05

2100-8 Temporary Vehicular Stream Crossing

Furnish, install, maintain, and remove temporary vehicular stream crossing as per VSMH spec

C-ENV-03

2100-9 Temporary HDPE Stream Crossing, 15" - 24"

Furnish, install, maintain, and remove temporary 15" - 24" HDPE stream crossing as per project specifications.

2100-10 Temporary HDPE Stream Crossing, 24" - 36"

Furnish, install, maintain, and remove temporary 24" - 36" HDPE stream crossing as per project specifications.

2100-11 Temporary Construction Entrance (Without Wash Rack)

Furnish, install, maintain, and remove temporary construction entrance per VSMH spec C-SCM-

03. The minimum entrance length shall be 75 feet and a woven filter fabric underliner is required.

2100-12 Vehicle Wash Rack EA Furnish, install, maintain, and remove vehicle wash rack per VSMH spec C-SCM-03. Price shall include cost for providing wash rack and an appropriate water source to wash the mud off vehicles.

2100-13 Dewatering Bag EA Furnish, install, maintain, and remove dewatering bag in accordance with VSMH spec C-SCM-

2100-14 Pump Around Diversion - 4"

WK Weekly rental for equipment rental time applies for pump use time only

2100-15 Pump Around Diversion - 6"

WK Weekly rental for equipment rental time applies for pump use time only

2100-16 Jute Mat, EC-3 SY

Furnish, install, secure, and maintain Jute Mat (or approved equal) using biodegradable stakes per VSMH spec C-SSM-05. All materials for EC-3 shall be from the VDOT approved material list except shall be limited to those materials that are fully biodegradable (no plastic or metal shall be allowed).

2100-17 Jute Mat, EC-2 SY

Furnish, install, secure, and maintain Jute Mat (or approved equal) using biodegradable stakes per VSMH spec C-SSM-05. All materials for EC-2 shall be from the VDOT approved material list except shall be limited to those materials that are fully biodegradable (no plastic or metal shall be allowed).

2100-18

Jute Mat, EC-2 to Include Seeding, Lime, Fertilizer, and 2" Topsoil

Furnish, install, secure, and maintain Jute Mat (EC-2) or an approved equal using biodegradable stakes, following VSMH Specification C-SSM-05. Prior to mat installation, apply seeding, lime, fertilizer, and a 2-inch layer of topsoil to promote vegetation establishment.

Seeding shall be performed at the specified rate according to the project’s approved seeding plan. Lime shall be applied at the appropriate rate per the site-specific nutrient management plan or based on soil test recommendations. Fertilizer shall be applied in compliance with all Federal, State, and Local regulations to ensure proper nutrient availability for seed germination and growth. Topsoil shall be applied to a uniform depth of 2 inches, free from debris, and meet VDOT or project-specific topsoil requirements. Jute mat shall be securely anchored and maintained to prevent displacement, ensuring effective erosion control and vegetation establishment.

2100-19 Coir Fiber Matting SY

Furnish, install, secure, and maintain Coir Fiber Matting using biodegradable stakes. Coir Fiber Matting shall consist of 100% natural/biodegradeable coconut fiber, have a weight of at least 700 grams per square meter (20.6 oz/SY), nominal opening size shall be 0.5 inches x 0.5 inches, thickness shall be between 0.3 and 0.4 inches. Stakes used to secure coir matting shall be wood.

2100-20 Composite Deck Mats SY Furnish, install, maintain, and remove composite deck mats as per VSMH spec C-SCM-02

2100-21 Timber Deck Mats SY Furnish, install, maintain, and remove timber deck mats as per VSMH spec C-SCM-02

2100-22 Install Natural Fiber Coir Logs, 12" - 16"

Furnish, install, maintain, and remove natural fiber coir logs 12" inches to 18" inches in diameter.

2100-23 Turbidity Curtain (50- Foot Section)

DAY Furnish, install, maintain, and remove turbidity curtain per VSMH spec C-SCM-09.

2100-24 Hydroseed SY

Hydraulic spraying of an approved aqueous mixture, consisting of slurry mulch, grass seed, and 50% of the specified fertilizer, in accordance with standard hydroseeding practices.

Hydroseeding shall not be performed in windy weather and only when the earth surface is damp. All seed containers must be tagged with information on the mixture, purity, and germination.

2200 – TREE PROTECTION

2200-1 Tree Protection Fence LF Furnish, install, maintain, and remove tree protection fence as per project specifications.

2200-2 Orange Safety Barrier Fence

LF Furnish, install, maintain, and remove orange safety fence as per project specifications.

2200-3 Deer Protection Fence LF Furnish, install, maintain, and remove deer protection fence as per project specifications.

2200-4 Tree Root Pruning LF

Prune approved trees, shrubs, and other woody plants in accordance with the latest edition of the ANSI-A300 pruning standards. Where specified in routine maintenance, this is done once annually in late winter/early spring (i.e., March). Remove and properly dispose of all waste material off-site.

2200-5 Tree Protection Planking

EA Planking shall be provided per Fairfax County PFM and design document specifications

2300 – EARTHWORK

2300-1 Animal Burrow Repair EA

Repair animal burrow and erosion due to animal activity on top and side slopes of dam embankments or elsewhere. Animal burrows within dam embankments and earthen berms must be repaired by "mud-packing" using a slurry mixture consisting of 90% soil (mostly sand), 10% cement and water. Disturbed areas must be backfilled with six (6") inches topsoil and stabilized with seed and mulch.

2300-2 Construction Stakeout/Survey

Construction Stakeout/Survey shall be furnished by the contractor for all construction items, and is to be paid in lump sum price to be determined by each project scope/size. This item does not include final design as-built survey and sign off by a Licensed Surveyor.

2300-3 Class A1 Riprap TN Furnish and install VDOT Class A1 riprap. A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap.

2300-4 Class I Riprap TN Furnish and install VDOT Class I riprap. A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap.

2300-5 Class II Riprap TN Furnish and install VDOT Class II riprap. A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap.

2300-6 Class III Riprap TN Furnish and install VDOT Class III riprap. A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap.

2300-7 Excavation- On-Site (Regular)

Regular excavation shall consist of removing and disposing of material located within the project limits, including widening cuts and shaping slopes necessary for preparing the roadbed, removing root mat, stripping topsoil, cutting ditches, channels, waterways and entrances; and performing other work incidental thereto. Regular excavation shall include cut material used as fill within the project limits and removal and disposal off site of any excess cut material. Removal of sediment from the bottom of existing pond (assuming mechanical removal). The volume of dredged material will be calculated from the design plans, bathymetric surveys and /or field measured as determined by the County/contractor, a ratio of 1.0-1.5 TN per CY may be applied to the calculated volume. Any damage occurring to the work due to the Contractor's operations or failure to adequately protect the work, or any over-excavation caused by the Contractor’s error, shall be corrected by the Contractor in a manner satisfactory to the Engineer, at no additional cost.

2300-8

Excavation - Supersaturted Wet Material to include Hauling in Sealed Trucks and Off-Site Disposal

Remove and properly dispose of all material off-site. Transport of sediment on public road for off-site disposal using a sealed or lined tandem truck is considered incidental to this item. A ratio of 1.7 TN per CY may be applied to the calculated volume. Any damage occurring to the work due to the Contractor's operations or failure to adequately protect the work, or any over-excavation caused by the Contractor’s error, shall be corrected by the Contractor in a manner satisfactory to the Engineer, at no additional cost.

2300-9 Stockpile and dry saturated material

Temporary stockpiling of spoil material on site for the purpose of drying and loading on truck is considered incidental to this line item. Place, grade, and shape stockpiles for proper drainage.

Place erosion control measures around stockpiles as required. Do not place stockpiles near edge of excavations or within drip line of remaining trees.

2300-10

Excavation and Hauling Non- Contaminated Soil Material

(Non-Capital Maintenance Only) Removal of sediment from the bottom of existing pond (assuming mechanical removal). The volume of dredged material will be calculated from the design plans, bathymetric surveys and /or field measured as determined by the County/contractor, a ratio of 1.0-1.5 TN per CY may be applied to the calculated volume. Any damage occurring to the work due to the Contractor's operations or failure to adequately protect the work, or any over-excavation caused by the Contractor’s error, shall be corrected by the Contractor in a manner satisfactory to the Engineer, at no additional cost.

2300-11 Excavation and Hauling Contaminated Soil Material

Waste collected as a result of excavation or dredging is considered a potentially hazardous special waste and must be disposed of in accordance with 9VAC20-81, Fairfax County Code Sections 109.1-6 and 109.1-7, and any other applicable local, state and federal guidelines. A ratio of 1.0-1.5 TN per CY may be applied to the calculated volume. Any damage occurring to the work due to the Contractor's operations or failure to adequately protect the work, or any over-excavation caused by the Contractor’s error, shall be corrected by the Contractor in a manner satisfactory to the Engineer, at no additional cost

2300-12 Imported Fill/Select Borrow Material

Furnish and install clean fill material that is free of weeds, debris and contaminants. Fill material shall be tested for any potential toxins based on the origin of the material and documentation shall be provided to the Project Manager. A ratio of 1.0 TN per CY may be applied to the calculated volume.

2300-13

Controlled Fill Adjacent to Storm Structures, for Dam and Embankments

Fill shall be added in accordance with the geotechnical specifications included in the design documents. A ratio of 1.0 TN per CY may be applied to the calculated volume.

2300-14 Fine Grading Bottoms of Wet/Dry Ponds and Water Quality Basins

The completed grading work shall present a uniform and well graded appearance with no abrupt or local change in slope or alignment. Any damage occurring to the work due to the Contractor's operations or failure to adequately protect the work, or any over-excavation caused by the Contractor’s error, shall be corrected by the Contractor in a manner satisfactory to the Engineer, at no additional cost

2300-15 Rock Excavation CY

Rock excavation shall be performed with systematic drilling, ram hammering, ripping, or blasting when permitted. Excavation that can be completed using equipment noted in 1.2.F shall be considered regular excavation. The Owner, in consultation with the geotechnical engineer, will provide a written determination of whether or not rock excavation is required. Rock excavation quantity will be measured in place. Blasting operations, if allowed, shall be in strict accordance with all existing State and County ordinances and regulations, and all blasting shall be done as directed by the Fire Marshals' Office and under permit and in accordance NFPA 495. Any damage occurring to the work due to the Contractor's operations or failure to adequately protect the work, or any over-excavation caused by the Contractor’s error, shall be corrected by the Contractor in a manner satisfactory to the Engineer, at no additional cost

2300-16 Salvage Topsoil, Stockpile Onsite, and Respread Onsite

Stockpile topsoil, borrow soil materials, and excavated satisfactory soil materials without intermixing. Place, grade, and shape stockpiles for proper drainage. Place erosion control measures around stockpiles as required. Do not place stockpiles near edge of excavations or within drip line of remaining trees.

2300-17 Topsoil - 2" SY

Furnish and install topsoil to a two (2") inch depth. Topsoil shall be a loam, sandy loam, clay loam, silt loam, sandy clay loam, or loamy sand. Soils having low moisture content, low nutrient levels, low pH, materials toxicity to plants and/or unacceptable soil gradation are not acceptable.

Topsoil shall not be a mixture of contrasting textured subsoils, and shall contain less than 5% by volume of cinders, stones, slag, coarse fragments, gravel, sticks, roots, trash, or other materials larger than 1 1/2" (inches) in diameter. It must be free of plants or plant parts of Bermuda grass, Quack grass, Johnson grass, Nutsedge, Poison Ivy, Phragmites, Canada thistle, or any noxious weeds and contain no substances harmful to plant growth. The soil shall have a pH between 5.5-6.5. Organic matter shall be greater than 5%. Maximum sand content in topsoil shall be 50%.

2300-18 Topsoil - 4" SY

Furnish and install topsoil to a four (4") inch depth. Topsoil shall be a loam, sandy loam, clay loam, silt loam, sandy clay loam, or loamy sand. Soils having low moisture content, low nutrient levels, low pH, materials toxicity to plants and/or unacceptable soil gradation are not acceptable.

2300-19 VDOT #1 or #2 Stone TN

Furnish and install VDOT No. 1 or No. 2 coarse aggregate stone (surge stone). A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap. Remove and properly dispose of all waste material off-site.

2300-20 VDOT #8 or #9 Stone TN

Furnish and install VDOT No. 8 or No. 9 coarse aggregate stone. A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap. Remove and properly dispose of all waste material off-site.

2300-21 VDOT #21A or #21B Stone

Furnish and install VDOT No. 21A or No. 21B coarse aggregate stone. A lining of geotextile fabric, "Geotex Mirafi 14ON" (or equal), is placed between the stone and the underlying soil surface to prevent soil movement into or through the riprap. Remove and properly dispose of all waste material off-site.

2300-22 VDOT #57 Stone TN

2300-23 Drainage Blanket (#68 stone or equivalent)

TN In accordance with VDOT Specification Section 208

2300-24 Sand (VDOT Fine Aggregate A)

TN In accordance with VDOT Specification Section 208

2300-25 Sand (VDOT Fine Aggregate B)

TN In…

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File details come from the government source that posted it. Updated Sep 23, 2025.